COBHAM GR712RC User Manual

GR712RC-UM, Jun 2017, Version 2.9 126 www.cobham.com/gaisler
GR712RC
1 Receiver enable (RE) - Set to one when packets are allowed to be received to this channel. Reset
value: ‘0’.
0 Transmitter enable (TE) - Write a one to this bit each time new descriptors are activated in the table.
Writing a one will cause the SW-node to read a new descriptor and try to transmit the packet it points
to. This bit is automatically cleared when the SW-node encounters a descriptor which is disabled.
Reset value: ‘0’.
Table 101. GRSPW RX maximum length register.
31 25 24 0
RESERVED RXMAXLEN
31: 25 RESERVED
24: 0 RX maximum length (RXMAXLEN) - Receiver packet maximum length in bytes. Only bits 24 - 2
are writable. Bits 1 - 0 are always 0. Not reset.
Table 102. GRSPW transmitter descriptor table address register.
31 10 9 4 3 0
DESCBASEADDR DESCSEL RESERVED
31: 10 Descriptor table base address (DESCBASEADDR) - Sets the base address of the descriptor table.
Not reset.
9: 4 Descriptor selector (DESCSEL) - Offset into the descriptor table. Shows which descriptor is cur-
rently used by the GRSPW. For each new descriptor read, the selector will increase with 16 and
eventually wrap to zero again. Reset value: 0.
3: 0 RESERVED
Table 103. GRSPW receiver descriptor table address register.
31 10 9 3 2 0
DESCBASEADDR DESCSEL RESERVED
31: 10 Descriptor table base address (DESCBASEADDR) - Sets the base address of the descriptor table.
Not reset.
9: 3 Descriptor selector (DESCSEL) - Offset into the descriptor table. Shows which descriptor is cur-
rently used by the GRSPW. For each new descriptor read, the selector will increase with 8 and even-
tually wrap to zero again. Reset value: 0.
2: 0 RESERVED
Table 104. GRSPW dma channel address register
31 16 15 8 7 0
RESERVED MASK ADDR
31: 8 RESERVED
15: 8 Mask (MASK) - Mask used for node identification on the SpaceWire network. This field is used for
masking the address before comparison. Both the received address and the ADDR field are anded
with the inverse of MASK before the address check.
7: 0 Address (ADDR) - Address used for node identification on the SpaceWire network for the corre-
sponding dma channel when the EN bit in the DMA control register is set. Reset value: 254.
Table 100. GRSPW dma control register

COBHAM GR712RC Specifications

General

Brand	COBHAM
Model	GR712RC
Category	Computer Hardware
Language	English